package com.wnhz.work.yz.utils;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

/**
 * Created by admin on 2017/6/8.
 */
public class ImageLoadUrl {

    public static void downloadImgByUrl(final String imgUrl,   final ImageView img) {
        downloadImgByUrl(imgUrl,100,img);
    }
    public static void downloadImgByUrl(final String imgUrl, final int pictureSize, final ImageView img) {


        new Thread(new Runnable() {
            @Override
            public void run() {
                Bitmap bitmap = null;
                BufferedInputStream is = null;
                HttpURLConnection conn = null;
                try {
                    URL url = new URL(imgUrl);
                    conn = (HttpURLConnection) url.openConnection();
                    is = new BufferedInputStream(conn.getInputStream());
                    is.mark(is.available());
                } catch (IOException e) {
                    e.printStackTrace();
                }
                BitmapFactory.Options opts = new BitmapFactory.Options();
                //2.为位图设置100K的缓存
                opts.inTempStorage = new byte[100 * 1024];
                //3.设置位图颜色显示优化方式
                opts.inPreferredConfig = Bitmap.Config.RGB_565;
                //4.设置图片可以被回收，创建Bitmap用于存储Pixel的内存空间在系统内存不足时可以被回收
                opts.inPurgeable = true;
                //6.设置解码位图的尺寸信息
                opts.inInputShareable = true;
                opts.inJustDecodeBounds = true;
//        bitmap=BitmapFactory.decodeStream(is, null, opts);
                opts.inSampleSize = computeSampleSize(opts, -1, pictureSize);
                opts.inJustDecodeBounds = false;
                try {
                    bitmap = BitmapFactory.decodeStream(is, null, opts);
                    is.reset();
                    conn.disconnect();
                } catch (Exception e) {
                    // TODO: handle exception
                } finally {
                    Message m = Message.obtain();

                    Map<String, Object> map = new HashMap<String, Object>();
                    map.put("img", img);
                    map.put("bitmap", bitmap);
                    m.obj = map;
                    h.sendMessage(m);
                }

            }
        }).start();

    }

    static Handler h = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            Map<String, Object> map = (Map<String, Object>) msg.obj;
            ImageView img = (ImageView) map.get("img");
            Bitmap bitmap= (Bitmap) map.get("bitmap");
            img.setImageBitmap(bitmap);

            super.handleMessage(msg);
        }
    };

    public static Bitmap revitionImageSize(String filePath, int pictureSize) {
        Bitmap bitmap = null;
        BitmapFactory.Options opts = new BitmapFactory.Options();
        //2.为位图设置100K的缓存
        opts.inTempStorage = new byte[100 * 1024];
        //3.设置位图颜色显示优化方式
        opts.inPreferredConfig = Bitmap.Config.RGB_565;
        //4.设置图片可以被回收，创建Bitmap用于存储Pixel的内存空间在系统内存不足时可以被回收
        opts.inPurgeable = true;
        //6.设置解码位图的尺寸信息
        opts.inInputShareable = true;
        opts.inJustDecodeBounds = true;
        bitmap = BitmapFactory.decodeFile(filePath, opts);
        opts.inSampleSize = computeSampleSize(opts, -1, pictureSize);
        opts.inJustDecodeBounds = false;

        try {
            bitmap = BitmapFactory.decodeFile(filePath, opts);
        } catch (Exception e) {
            // TODO: handle exception
        }
        return bitmap;
    }

    public static int computeSampleSize(BitmapFactory.Options options, int minSideLength, int maxNumOfPixels) {
        int initialSize = computeInitialSampleSize(options, minSideLength, maxNumOfPixels);
        int roundedSize;
        if (initialSize <= 8) {
            roundedSize = 1;
            while (roundedSize < initialSize) {
                roundedSize <<= 1;
            }
        } else {
            roundedSize = (initialSize + 7) / 8 * 8;
        }
        return roundedSize;
    }

    private static int computeInitialSampleSize(BitmapFactory.Options options, int minSideLength, int maxNumOfPixels) {
        double w = options.outWidth;
        double h = options.outHeight;
        int lowerBound = (maxNumOfPixels == -1) ? 1 : (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels));
        int upperBound = (minSideLength == -1) ? 128 : (int) Math.min(Math.floor(w / minSideLength), Math.floor(h / minSideLength));
        if (upperBound < lowerBound) {
            // return the larger one when there is no overlapping zone.
            return lowerBound;
        }
        if ((maxNumOfPixels == -1) && (minSideLength == -1)) {
            return 1;
        } else if (minSideLength == -1) {
            return lowerBound;
        } else {
            return upperBound;
        }
    }
}
